An elevation is different. It shows the face of something, or perhaps more correct, the projection of an object/s to a plane. But my testing suggests it produces SECTIONS, not elevations.
Yes, you can use abbreviations in tables and figures. All abbreviations used in tables and figures should be defined in the table note or figure caption, respectively, even though the abbreviations will be also be defined in the text if they are used there.
The plural abbreviation of measurement is measureâs., measâs., or Mâs. Remember that use of the apostrophe in plural abbreviations should be avoided, unless omitting it will cause the reader confusion. This abbreviation can be found in food preparation, engineering, aerospace, in medical laboratories, and mathematics.